85688459 has 2 divisors, whose sum is σ = 85688460. Its totient is φ = 85688458.

The previous prime is 85688443. The next prime is 85688467. The reversal of 85688459 is 95488658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85688459 - 2⁴ = 85688443 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85688459.

It is not a weakly prime, because it can be changed into another prime (85688059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42844229 + 42844230.

It is an arithmetic number, because the mean of its divisors is an integer number (42844230).

Almost surely, 2^85688459 is an apocalyptic number.

85688459 is a deficient number, since it is larger than the sum of its proper divisors (1).

85688459 is an equidigital number, since it uses as much as digits as its factorization.

85688459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2764800, while the sum is 53.

The square root of 85688459 is about 9256.8060906557. The cubic root of 85688459 is about 440.8668499699.

The spelling of 85688459 in words is "eighty-five million, six hundred eighty-eight thousand, four hundred fifty-nine".